AD8332ARU-REEL

Overview

The AD8332ARU-REEL is a dual-channel, ultralow noise linear-in-dB variable gain amplifier (VGA) from Analog Devices. It integrates an ultralow noise preamplifier (LNA), an X-AMP VGA with 48 dB range, and a selectable postamplifier. The device operates on a single 5 V supply, providing a 100 MHz bandwidth and 650 V/µs slew rate. Key electrical parameters include a 19 dB LNA gain, 0.74 nV/√Hz input voltage noise, and 48 nV/√Hz output-referred noise. It features a 50 dB/V gain scaling factor, ±5 mV offset voltage, and supports programmable output clamping.

Feature Summary

• Integrates an ultralow noise preamplifier with active input impedance matching for optimized signal acquisition.
• Provides precise linear-in-dB gain control via a 50 dB/V scaling interface across a wide dynamic range.
• Includes a selectable postamplifier with adjustable output limiting to prevent overload in downstream stages.

Applications

• Ultrasound and sonar time-gain controls
• High performance automatic gain control (AGC) systems
• I/Q signal processing
• High speed, dual ADC drivers

Procurement Notes

Verify the specific package type against the ordering suffix, as the AD8332 series includes both TSSOP and LFCSP variants. Confirm that the REEL designation matches the required tape-and-reel packaging format for automated assembly. Ensure compatibility with the 5 V single-supply requirement and check for any lead-free or RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when dual-channel differential amplification with ultralow noise is critical. The AD8332 offers superior linearity and distortion performance compared to standard VGAs. Consider the available gain modes: LO mode provides -4.5 dB to +43.5 dB range, while HI mode offers 7.5 dB to 55.5 dB. The device is optimized for driving 10-bit and 12-bit ADCs directly.

Part Context

This part belongs to the AD8331/AD8332/AD8334 family of ultralow noise VGAs. While the AD8331 is single-channel and the AD8334 is quad-channel, the AD8332 specifically provides two identical channels in a compact footprint. The family shares core X-AMP technology but differs in channel count and package options like QSOP, TSSOP, and LFCSP.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.